Dumping-grate.



E. A. WILDT. DUMPING GRATE.

TION I'ILBD-JAN.25,1913.

Patented June 16, 1914.

a sn'nms SHEET 1.

ZweIZ/ZZI." Edward 14 M76 E. A. WILD-T.

DUMPING GRATE.

AIILIOATION FILED 31151.25, 1913,

1,]LOO,4.1 2. Patented June 16,1914.

3 SHEETSSHBET 2.

$6666 6. java 7%) I g; 'fdwardfz y E. A. WILDT.

DUMPING GRATE. APPLICATION FILED JAN. 25, 1913.

Patented June 16, 1914.

3 SHEETSSHEET 3.

FCIIIIuII W Ill llllllllll UNITED STATES PATENT oFFIo EDWARD A. wr'nnr, or summon, rir'uusrnvanm.

DUKPING-GRATE.

. Specification of Letters Patent. at t d J n 1914 To all whom it may concern:

Be it known that I, EDWARD A. WILDT, a citizen of the United States, residing at Scranton, Lackawanna county, State of Pennsylvania, have invented certain new and useful Improvements in Dumping- Grates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same.

My present invention relates to the rock'- ing sections of dumping grates which are used for burning fine grades of coal, culrn, etc., and it is particularly directed to the construction of a dumping grate section which is not subject to the warping usually incident to the cumulative effect of the unequal expansion of the several parts of the grate sections, and particularly noticeable as between the hot fire surface and the under surfaces of the gratewhich are cooled by the air blast. This warping of the grate sections produces an uneven grate surface and a mismatching 0f the sections resulting in the occurrence of openingsof .greater area, at various regions throughout the surface of the grate, through which the air draft or blast, as the case may be, rushes in undue volume precluding themaintenance of an evenly distributed fire upon the grate; and may cause such a distortion of the sections that they interfere and will not close properly, and finally break.

I have illustrated a grate section constructed in accordance with the present in ven'tion in the accompanying drawings, in

2 which- Figure 1, is a view in perspective of the grate section; Fig. 2 is a bottom plan of the same; Fig. 3 is a section on line 33 of Fig. 2, and Figs, 4 and 5, are details in perspective showing the two sides of one of the units employed.

Referring to the drawings, my grate section is made up of two end plates A and B which are each provided with a trunnion C projecting from their outer surface, and a plurality of stacks D of interlocking grate units E, which may be, for instance, of the configuration shown in Figs. 4 and 5, the

end units of which stacks interlock with the The upper surface ofeach of thegrate units E termlnates .at one end in an overlap I and i at the other end in an underlap J and the overlaps I of the units E in one stack D of said units engageunderlaps J of the units E 1n the next adjacent stack D of units E. When the grate section is completely assembled as in Fig. l, t-he'overlaps I of the units of one end stack will form one edge of the grate section, and the underlaps J of the units the opposite end stack will form the opposlte edge of the grate section so that when two or more grate sections are placed in the furnace each will be provided with an overlapping edge and an underlapping edge which will engage with the adjacent grate sections to avoid apertures at the junctions f the grate section and, since each unit is separate from the adjacent unit, that warp- I 'ages due to expansion and contraction will siderable expense entailed in the purchase of an entire grate section when a portion only is destroyed is materially reduced.

What I claim and desire to protect by Letters Patent is:

1. A dumping grate-section comprising a plurality of stacks of interlocking grate units, separate end plates embracing the ends of several stacks of units and tie rods connecting said end plates and maintaining units and separate trunnioned one-piece end plates common to all of said stacks of units; substantially as described.

too

A dumping grate section comprising a plurality of stacks of interlocking overlapping grate units and separate one-piece end plates common to all of said stacks of units; substantially as described.

A dumping grate section, comprising aplurality of over and under lapping stacks of interlocking grate units, each of said units having an. overlap upon one end of its fuel supporting surface and an underlap upon the opposite end of its fuel supporting surface; substantially as described.

6. A dumping grate section, comprising a plurality of over and under lapping stacks of interlocking grate units, each of said units having an overlap upon one end of its fuel .fuel supporting surface and an underlap supporting surface and an underlap upon the opposite end of its fuel supporting surface, and separate one-piece end plates common to all of said stacks of units; substantially as described.

7. A dumping grate section, comprising a plurality of over and under lapping stacks of vinterlocking grate units, each of said units having an overlap upon one end of its upon the opposite end of its fuel supporting surface, separate one-piece end plates common to and interlocking With the end units of all of said stacks, and tie rods connecting said end plates; substantially as described.

8. A dumping grate section comprising a plurality of slidably over and under lapping stacks of interlocking grate units, and separate one-piece end plates common to and interlocking With the end units of all of the said stacks; substantially as described.

9. A dumping grate section comprising a plurality of slidably over and under lapping stacks of interlocking grate units, and separate one piece end plates common to and interlocking with the end units of all of said stacks, said end plates having overlaps on one end of their fuel suporting surfaces and underlaps on the opposite ends of their fuel supporting surfaces to correspond with the exposed overlaps and underlaps of the units of the first and last stacks; substantially as described.

10. A dumping grate section comprising a plurality of slidably over and under lapping stacks of interlocking grate units, each of said units having an overlap at one end of its fuel supporting surface and an underlap at the opposite end of its fuel supporting surface, trunnioned end plates'common to and interlocking with the end units of all of said stacks, said end plates having over-' EDWARD A. WILDT.

Witnesses JosEBH S. MILLE C. A. KEEGAN. 

